Combined screen and chute.



No. 69,3,0l9. Patented Feb. n, 1902.

a. HOLMES.

COMBINED SCREEN AND GHUTE.

(Application filed m 31, 1901. (No Model.) 2 Sheets-Sheet I.

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Patented Fh. 1902.

G. HOLMES.

COMBINED SCREEN AND CHUTE.

(Application filed May 81, 1901.)

2 Sheets-Sheet 2.

(No Model.)

UNITED STATES PATENT OFFICE.

GRANT HOLMES, OF DANVILLE, ILLINOIS, ASSIGNOR TO ROBERT HOLMES & BROS, OF DANVILLE, ILLINOIS.

COMBINED SCREEN AND CHUTE.

SPECIFICATION forming part of Letters Patent No. 693,019, dated February 1 1, 1902.

Application filed May 31,1901.

To all whom, it may concern.-

Be it known that I, GRANT HOLMES, of the city of Danville, county of Vermilion, and State of Illinois, have invented a certain new and useful Combined Screen and Chute for Screening, Grading, and Distributing Goal, of which the following is a specification.

This invention provides means for separat: ing mine-run coal into difierent grades and for distributing the different grades separately or in various combinations. It is exemplified in the structure hereinafter described and it is defined in the appended claims.

In the drawings forming part of this speci fication, Figure 1 is a side elevation, partly in section, showing my invention embodied in a complete grading, distributing, and storing or car-loading equipment. Fig. 2 is a detail in longitudinal vertical section of the combined chute and grader. Fig. 3 is a detail illustrative of the means preferably employed to adjust the doors of the chute-bottom of the screen.

At 1 is shown a hopper, into which minerun coal is dumped or otherwise delivered.

At 2 is shown a chute through which the mine-run coal may be carried to a car or storage-receptacle in case it should not be desired to separate and grade it.

At 3 is shown a swinging lower section of chute 2, and at 4 is shown a line for raising and lowering the swinging end of section 3.

The hopper 1 has a swinging door 5 in its bottom, and when such door is turned into position shown in the drawings the mine-run coal is delivered into the upper end of the inclined screen-section 6. The screen-section 6 has a set of screen-bars 7, onto which the coal falls and by means of which the coal is partly separated, and it has a set of stepped perforated screens 8, 9, 10, and 11. The bottom 6 of screen-section 6 is solid except for a door, as 20, and such door extends flush with the bottom when closed and forms a continuation thereof. The screen-section 6 discharges onto screen-section 12, which forms a continuation of section 6. Screens 13 and 14 of section 12 have perforations somewhat larger than the perforations of screens 8, 9, 10, and 11, and in screens 15,16, and 17 the size Serial No. 62,559. (No model.)

of the perforations is gradually increased. The bottom 12 of section 12 is solid except for doors 20, and such doors when closed form continuatious of the chute-floor. The two sections of the screen-chute are practically one, and they are separated, so that one may be swung in a direction opposed to the swing of the other, thereby neutralizing the jar in the tipple incident to the oscillation of the screens.

The screen-sections are sustained by swinging rods 21, and they are agitated by rods 31 and 32, which connect with brackets 22 and 23 of the screen-chutes and receive motion from eccentricsor cranks.

When mine-run coal is supplied to the up per end of the screen-chute and the chute is agitated, the finest particles of coal will pass through the perforations of the screens 8, 9, 10, and 11, fall onto the chute-floor 6, and begin its travel down the chute. A coarser grade of coal will fall through the perforations of screens 13 and 14:, and so on down the entire length of the screens. As a result of this arrangement there are always a number of sheets of coal traveling down the chute floor, each in its own particular space and each of its own particular grade, and any one of the sheets may be withdrawn from the chute before it mingles with the sheet next below it by opening a door 20 in the bottom of the chute, or thedifferent grades may be permitted to remingle in any desired correlation by letting one or more sheets of flowing coal mingle with the sheet or sheets next below. For instance, slack of various degrees of fineness may pass through screens 8 9 10 and a part of screen 11, may be discharged through a door 20 into chute 24, and may be conveyed to the slack-bin 33 or loaded into a car. Peacoal may be intercepted by a door 20 and transferred through a chute 25, nut-coal may be diverted to chute 26, egg-coal may go to chute 27, and lump may pass over the tailboard 18 to chute 19, or the slack and the pea coal may go to chute 25, the nut and the egg may go to chute 27, or the combinations may be made up in various other ways. In this instance the chutes 25, 26, and 27 discharge into a distributer 34 and chute 19 discharges into a distributer 35; but so far as this invention is concerned the destination of the coal traveling through the diverting-chutes is immaterial.

The doors 20 may be held open or closed by anysuitable means, and Fig. 3 is introduced to show one form of mechanism by which the doors may be controlled. In this figure a door pivot is shown at 20, an arm 28 is shown fastened onto the extended end of the pivot, and a pin 29 is shown inserted through a hole in the end of the arm and into a hole 30 in the side of the chute. There are two pin-holes, one of which may be used'when the door is held open and the other of which may be used when the door is held closed.

In case it should be desirable to deliver mine-coal to cars the swinging end 3 of chute 2 is lowered into line with tail-board 18 and the door 5 is turned into alinement with the bottom of the chute 2.

I claim- 1. In a combined screen and chute, the combination of a chute, a hopper for the upper end of the chute, a door in the bottom of the hopper swung between its ends on a transverse pivot, and a screen extending below the chute lengthwise thereof and comprising an imperforate bottom having closable openings at intervals and graded screens above the imperforate bottom, substantially as described.

2. In a combined screen and chute, the corn- GRANT HOLMES.

Witnesses:

FRANK LINDLEY, FRED; B. PENWELL 

